Photoionization Detectors gases and vapors

摘要

The invention relates to the field of analytical techniques, namely, to measuring concentrations of components with a gas chromatographic analysis. Photoionization detection of gases and vapors comprising an ultraviolet radiation lamp, provided with an exit window, which is placed on the flow chamber provided with two electrodes connected to an electrometer and logger signal detector connected to the output of the electrometer. Characterized in that the flow chamber is formed, arranged in parallel electrodes and a fluoroplastic gasket formed as a ring and placed between them, wherein one of the electrodes disposed on the output window ultraviolet lamp and has an opening in which is mounted a window made of a material transparent to ultraviolet radiation, and the second electrode is provided with openings for entry and exit of the sample gas stream, wherein the electrodes are made of metals with different values electron work function. The electrode disposed at the exit window of ultraviolet radiation legs, made of nickel, and parallel to the electrode - of cesium.